cross puzzle blitz

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Across
  1. 2. a dimensionless quantity representing the amount of matter in a particle or object
  2. 7. the rate of change of velocity
  3. 9. a one- or two-letter abbreviation for a chemical element name
  4. 11. the energy of motion, observable as the movement of an object or subatomic particle
  5. 13. that portion of the electromagnetic spectrum between x rays and visible light
  6. 15. a particle of matter that uniquely defines a chemical element
  7. 18. a mixture of gases that surrounds the Earth
  8. 19. standard unit of power
  9. 20. a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium
  10. 22. the number of waves that pass a fixed point in unit time
  11. 23. a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal.
  12. 24. a form of electromagnetic radiation, similar to visible light
  13. 28. type of stored energy that an object or system of objects may have based on their size, shape, position, or even material they are made from
  14. 29. a streak of light in the sky caused by a meteoroid crashing through Earth's atmosphere
  15. 30. the opposite of a concave shape
Down
  1. 1. consists of our star, the Sun, and everything bound to it by gravity
  2. 3. Energy stored in the bonds of chemical compounds
  3. 4. The rate of change of position of an object in any direction
  4. 5. the electrons in the outermost shell, or energy level, of an atom
  5. 6. the circular motion of an object around its center
  6. 8. force that resists the sliding or rolling of one solid object over another
  7. 10. the region around a magnetic material or a moving electric charge within which the force of magnetism acts
  8. 12. energy that comes from a source and travels through space at the speed of light
  9. 14. the segment of the electromagnetic spectrum that the human eye can view
  10. 16. superheated matter – so hot that the electrons are ripped away from the atoms forming an ionized gas
  11. 17. temperature at which the solid and liquid forms of a pure substance can exist in equilibrium
  12. 21. the distance covered by an object in unit time
  13. 25. small, rocky objects that orbit the Sun.
  14. 26. the bending of light
  15. 27. The smallest particle of a substance that has all of the physical and chemical properties of that substance.